Model 37
60
DC VOLT & 4-20mA PANEL METER
Page 1
7
The
3760 contains a "calibration switch" which is accessed by removing the rear panel of the instrument.
This switch is used to set the range of the front panel
pushbutton
(and rear remote control) of the CAL /
Remote CAL function of the 3760 instrument. The "calibration" switch is recommended to be set at the
same value (0 thru F) as the front panel
's
"Wide Span" control. At this setting, the internal votlage
reference will produce approx. 80% of the full scale value of the calibrated unit. This allows the user to
produce a reference check of the instrument's calibration integrity.
FRONT
CALIBRATION
(RCAL) setting
Procedure should be done once the instrument has been calibrated per the instructions above.
To access the "calibration switch":
1)
Remove power from the instrument.
2)
Record the postition of the front panel "Wide Span" control....... 0 thru F position.
3)
Remove the
4
phillips head screws retaining the back panel of the instrument
4)
Remove the
rear panel
(with slides) and
rotated away from the instrument
. L
ocate the blue
rotary
switch to the bottom right of the instrument and set the switch to the "Wide
Span"
control position as noted in Step 2.
When complete, re-assemble the back panel and slides.
Re-energize the instrument.
With your "zero" input active, depress the front "CAL" button, or the rear panel "Remote CAL" logic and
record the value on the display. This will be your calibration reference number. If any changes are made to
the front panel controls, this reference number will change reflecting a "calibration" change has occurred to
the 3760 unit.
Rear Panel 3760
