TENNEY ENVIRONMENTAL
Tenney Junior Test Chambers: Models TJR and TUJR, W942, or WF4
Page 28
11.4 TempGard IV Alarm Setpoint Entry
The purpose of this section is to explain how to set your low & high temperature alarm setpoints with the
optional TempGard IV. This feature is part of the optional Alarm And Shutdown Circuit described earlier.
Normal Conditions: When conditions are within the alarm setpoints, the upper display of the Watlow 93
will indicate the process temperature (normally in degrees Celsius), and the lower display will be blank.
Temperature measurements are made with a 100 ohm platinum RTD sensor.
Alarm Setpoint Entry Procedure: Disregard parameters not listed. (You will be in the Operation Menu.)
1. Press the Advance Key (key with two curved arrows) to scroll to the Alarm Low (ALO) parameter
(lower display). Use the Up / Down arrow keys to set the desired low alarm setpoint (upper display).
2. Press the Advance Key to scroll to the Alarm High (AHI) parameter (lower display). Use the Up / Down
arrow keys to set the desired high alarm setpoint (upper display).
3. After setting the low and high limit values, continue scrolling with the Advance Key until the Alarm Low
setpoint that you just entered appears in the lower
display. It will go blank after a few seconds.
Note: On the old style Watlow 965 Controller, you must press the “M” key to scroll in any menu.
Alarm Conditions: When an out of limit condition occurs, the lower display will flash “HI” or “LO”.
Important: When the alarm condition has cleared, the TGIV alarm will automatically reset. You must
then reset the chamber control circuitry by pressing the chamber Reset button. For Models TJR / TUJR only,
cycle the Chamber Power switch. These switches are on the TGIV panel.
Setup Menu: The Setup Menu is provided for reference only. It has already been configured. Do not
change any values unless circumstances demand it, such as when you need to change controllers.
To access the Setup Menu, press the Up Arrow and the Down Arrow keys simultaneously. Setup parameters
are shown in the lower display. Parameter values appear in the upper display. Press the Advance key to
scroll through the menu. Values for the Low Range Limit (rL) and the High Range Limit (rH) are the low and
high temperature ratings of your chamber, minus and plus 4 degrees, respectively.
SETUP MENU for WATLOW 93 - TEMPGARD IV
Parameter Value Parameter Value
LOC 1 Ot2 PrA
In rtd HSA 1
dEC (default) LAt Nla
C - F C SIL (default)
rL
Low Limit minus 4 deg.
rtd Din
rH
High Limit plus 4 deg.
rP OFF
Ot1 ht P L 100
HSC (default) dSP Pro
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