Fluke Biomedical 956A-201-M2 - Manual (Page 44)

3-18
After entry of a new setpoint, it is recommended that entry of the new setpoint be verified by displaying the
new setpoint value.
Code EEEEE indicates that the monitored radiation field is greater than the maximum range of the
detector.
Error codes are cleared automatically when the initiating event is corrected.
Table 3-5. Model 956A-201-M2 Error Codes
Error Codes Function
E0001 Negative display data
E0002 Invalid setpoint value (s) (Not implemented)
E0007 Invalid Function
E0004 Invalid analog scale values or invalid HIGH/WARN alarm set
point
EEEEE Overrange Condition
For PROM version 94095603, the display of Error Codes E0002
invalid setpoint is not enabled. When an invalid setpoint is
selected, and the ENTER pushbutton is pressed, the invalid
setpoint is not accepted, and an error code is not displayed. It is
recommended that after any setpoint change is made, the
operator rechecks the setpoint value, to ensure the desired value
has been entered.
3.11 ANALOG OUTPUT
The analog outputs are a logarithmic function of the current UDR reading. The outputs are scaled by the
Full Scale Value and Low Scale Value, positions 3 and 7 respectively of the FUNCTION switch. An 8-bit
DAC is used to convert the displayed dose rate to a 4-20 mA or 0-10 Vdc output on connector P6 (on the
rear panel). Output current or voltage is calculated using the following equations (shown below):
P = log (R/LSV)/ [ log (FSV) - log (LSV) ]
and
V
= P (VMax - VMin) + VMin or = P (IMax - IMin) + IMin
where:
P
= Percent of scale, expressed in a decimal number
R = Current reading
LSV = Low Scale Value
FSV = Full Scale Value
V = Voltage output
I = Current output
Vmax = Maximum voltage available (usually 10Vdc)
Imax
= Maximum current available (usually 20 mA)
Vmin = Minimum voltage available (usually 0 Vdc)
Imin
= Minimum current available (usually 4 mA)
NOTE