Error Conditions; Error Messages - Process Technology DQ15D Instruction Manual

4-20 mA Output (Continued)
10 Press or to adjust the lower current value.
Press SET to retain the value. The screen displays
U followed by the current upper display value lim-
it,( i.e. 500°, 10 volt)
11 Use or to alter the upper display value.
Press SET to retain the value. The display will
then read hexadecimal D555 or 20.0 mA.
12 Verify the value by observing the value on your 4-
20 mA calibrator/tester or DMM.
13 Adjust the upper current output value by pressing
or . Press SET to retain the value. The cur-
rent sensor input value then displays and the 4-20
mA output will reflect your new or confirmed set-
tings.
14 Turn OFF all power.
15 Disconnect calibration equipment.
16 Reconnect 4-20 mA lead and sensor leads.
17 Reinstall rear cover.

Error Conditions

Sensor values that are out of range will generate an
error display. The temperature range is as follows:
Celsius: <-40° C or >+538° C
Fahrenheit: <-40° F or >+1000° F
Calibration Error Messages
If calibration or setup information stored in the memory
becomes corrupt or erased, DQ15D switches to its
default calibration and setup settings. A flashing letter
c displays on the left side when DQ15D switches to
default settings. The size and position of the letter c
will define the exact nature of the problem.
c A small c in the upper left-hand corner indicates
the control is relying on default (factory set) calibra-
tion values. This happens when the control is new
and has not yet been calibrated (setup).
c A small c in the lower left hand corner indicates the
control is relying on default configuration values.
This is a rare condition, but may occur if the con-
trol has been calibrated for use with a two-wire
RTD sensor but the configuration parameters have
not been changed from their default values.
Changing any of the configuration or Set Point var-
iables will turn off this indication.
M-34-01-06 3/31/2016
C A large C on the left side of the display indicates
default values are being used for the configuration
and the calibration. This can occur in a new control
that has never been calibrated or configured, or if
the memory has been erased.
RTD Error Messages
If the screen displays one of the following messages,
the control relay de-energized due to an RTD condi-
tion.
HHH A thermocouple or RTD sensor is improp-
erly connected, or the control read an open circuit.
UUU The RTD sensor shorted.
Note: This does not apply to THERMOCOUPLES. A
thermocouple short causes a new junction/measurement
point to be created. This will lead to false readings and
dangerous operating conditions. Shorted thermocouples
will not result in an error condition. Instead, incorrect read-
ings will be displayed.
13
DQ15D/T-DQ15D Manual