How to Operate a Constant Temperature and Humidity Test Chamber
This 6-minute walkthrough shows a chamber being commissioned and then driven from its own panel: the Derui staff connecting the supply, filling and bleeding the water circuit, and setting up the first run. The machine in the clip is the constant temperature and humidity test chamber from the DR-H201 series, and the two running modes it uses — Fix Running and Pattern Running — are the two modes named in the published specification. It is a practical guide rather than a product tour: the panel walkthrough runs from the first setpoint through to the data export and the alarm log.
What This Video Shows
The clip is a commissioning and operation guide, filmed on one machine from start to finish. It begins before the chamber is powered and ends on the record and alarm screens, working through one step at a time: supply first, water second, settings third, records last.
What the walkthrough covers
▸ Connecting the supply, and which conductors the terminal block takes.
▸ Filling the water tank and bleeding the water circuit at the valve on the rear of the machine.
▸ Setting temperature and humidity on the panel, then setting the stop mode and the timer before starting the run.
▸ Switching from fixed value running to a multi-section program, and setting how many times it repeats.
▸ Reading the graph and record screens, exporting data to a USB flash drive, and reading the alarm log.
Why the order is water before settings
Humidity is the part of a climate chamber that is easiest to get wrong, and the video opens on the water circuit rather than on the controller. The tank is filled and the line bled before the humidity channel is brought into use, and the rear valve is the step that clears the air out of it.
Commissioning the Chamber: The Steps in the Video
Step 1 - Connect the supply
Three conductors are terminated at the supply: line, neutral and earth. The published voltage differs by model — single phase 220 V on the smaller chambers and three phase 380 V on the larger ones — so the terminal arrangement follows the model ordered.
Step 2 - Fill the water tank
The tank is pulled out from the machine and its lid opened. Water is poured in to roughly the middle of the tank, the level the video uses as its example.
Step 3 - Bleed the water circuit
At the rear of the machine a water valve is opened to let the air out of the line. It is closed again once the flow comes out as a steady stream rather than in bursts.
Step 4 - Power up and set the conditions
The panel comes up in fixed value mode. The video's example sets 30 °C and 60 % RH, then moves to the stop mode and the timer before returning to the main screen to start the run.
The stop mode is the setting that decides how a fixed value run ends: the panel offers a manual stop and a timed stop. In the video a 1-hour timer is set as the example, so the run is governed by that timer rather than by an operator watching the clock.
The Two Running Modes on the Panel
Fixed value running
One setpoint pair is entered and held. The video sets 30 °C and 60 % RH, chooses the stop mode, sets a 1-hour timer and starts the run. This is the mode for a single condition — a soak, a storage test or a steady-state humidity exposure.
Pattern running
▸ The program is edited section by section. The video's example uses 40 °C and 30 % RH, with the first section set up and the second section carrying the test duration.
▸ The edit screen also has auxiliary settings, including a base section and the SP value that goes with it.
▸ A cycle count is entered for the whole program: set to 1 the program runs once, set to 2 it repeats. The presenter shows both.
▸ Separately from the overall count, a chosen range of sections can be given its own cycle count, so one block of the profile repeats more often than the rest.
▸ The pattern name itself is editable, so programs can be named after the test they belong to.
▸ One menu item on the panel is pointed out as a function this particular unit is not fitted with.
Records, Data Export and the Alarm Log
▸ The graph and record screen shows the logged curve for the run. The time axis can be adjusted, and the data table below it is scrolled by holding and then using the on-screen arrows.
▸ For export, a date range is selected on the panel — the video picks two consecutive dates — and the data is written to a USB flash drive inserted at the machine.
▸ The reservation setting schedules a start: the current time and the required start time are entered, the setting is enabled, and the chamber begins the selected program at the reserved time without an operator present.
▸ The alarm log lists the alarm items the panel currently reports, and keeps a history with the time and the item of each entry, which is what a maintenance or quality record is built from.
Operation-Relevant Published Specifications
| Item | Published specification | Why it matters when running the chamber |
|---|---|---|
| Supply and power | DR-H201-100 and DR-H201-150: single phase 220 V. DR-H201-225, DR-H201-408 and DR-H201-1000: three phase 380 V. Total power 4.5 kW to 21.5 kW depending on model and low-temperature variant. | The video opens on the supply connection, so match the terminal arrangement and the breaker to your site before the chamber is unpacked. |
| Water circuit | Circulating water supply. Water tank 25 L, one tank on chambers below 800 L and two tanks above. | Steps 2 and 3 of the video are the fill and the bleed. The tank capacity tells you how much water to have ready before a long humidity run. |
| Temperature and humidity range | −20 °C, −40 °C or −70 °C up to +150 °C; humidity 20 % to 98 % RH. Internal volumes from 100 L to 1000 L. | The setpoints used in the video, 30 °C / 60 % RH and 40 °C / 30 % RH, both sit inside the published range. |
| Control and running modes | Programmable LCD touch screen with Fix Running and Pattern Running. Balanced temperature and humidity control (BTHC) with PID adjustment. | The two modes demonstrated on the panel, and the choice an operator makes between a soak test and a profile. |
| Accuracy and data output | Temperature accuracy 0.01 °C, fluctuation ≤±0.5 °C, uniformity ≤1.5 °C, the latter two under the published no-load conditions; humidity accuracy 0.1 % RH, fluctuation ≤±2.5 % RH. Output RS-232, USB optional. | What the logged record is meant to represent, and the interface the export in the video uses. |
What the Video Does and Does Not Show
What it shows is that a chamber of this class is driven entirely from its own touch screen, and that the machine keeps its own record. Setpoints, stop mode, timer, program sections and cycle counts are entered on the panel; the curve, the data table, the export and the alarm history are read back from it. For a buyer, the useful part is seeing those screens before ordering.
What it does not show matters just as much. The clip names no test standard and no profile, so it is not evidence that a particular method is met, and it carries no performance verification, so it is not evidence of the uniformity or tolerance figures above. What your quality system will ask for is the record that leaves the plant with the machine, and what your operator needs is the manual for the exact model — menus and terminal arrangements differ between the smaller and larger chambers in the series.
What to Confirm Before the First Run
▸ The supply: single phase 220 V or three phase 380 V, matching the model ordered, with the earth connection the terminal block expects.
▸ Water: a circulating water supply, and where the tank is filled, drained and re-filled between runs.
▸ The room: the published cooling method is air-cooled, so confirm the installation space can carry the heat the chamber rejects before it is positioned.
▸ The profile: the standard your method names, both ends of the temperature range, the humidity range, and how many sections the profile needs against the published 100-section ceiling.
▸ The documents and the record: the operation manual and wiring diagram for the exact model, and whether the factory inspection record is enough or your audit also needs an ISO 17025 accredited laboratory report.
What to Send With an Enquiry
▸ What you are testing, the specimen size and mass, and whether it has to be powered or monitored inside the chamber during the run.
▸ The standard and the profile: both ends of the temperature range, the humidity range, and the number of stages the profile steps through.
▸ The volume you need — the series runs from 100 L to 1000 L — measured against your largest specimen and whatever has to be loaded with it.
▸ Your site power supply, so the correct variant and terminal arrangement are quoted from the start, and the data interface you want — the published output is RS-232 with USB optional.
Frequently Asked Questions
Video Summary
In six minutes this video covers the whole operating sequence of a DR-H201 constant temperature and humidity test chamber: supply connection, water fill and bleed, setpoints and stop mode, fixed value and pattern running, the record and export screens, a scheduled start, and the alarm log. The setpoints used are the video's own examples — 30 °C and 60 % RH for the fixed value run, 40 °C and 30 % RH for the program.
The point worth carrying away is what the machine records by itself. The curve, the data table, the exportable file and the alarm history all live on the panel, which is what a quality system can work from directly. What the video cannot tell you is whether your particular standard and profile are met — that is settled by the specification, the manual for your model, and the inspection record that ships with the unit.
Need a Climate Chamber Proposal?
Send what you are testing, the standard and profile, the volume you need and your site power supply through the contact page, and we will confirm the model, the controller configuration and the documentation your project needs.
