Grant GR150 Manual De Operación página 24

3.7.6. Calibration/Test
If a change in calibration of the system is required this should be carried out in the following
manner. Calibration should be carried out using a traceable reference thermometer with an
accuracy of at least 0.1ºC and when stable set CAL value to reference thermometer reading.
Press both buttons for > 3 seconds
Internal probe. Sets Low end of
calibration range.
Internal probe. Sets High end of
calibration range.
External probe. Sets Low end of
calibration range
.
External probe. Sets High end of
calibration range.
LCAL & LCLE max: 20°C
hCAL & hCLE min: 70°C
Restore factory internal calibration
values.
Restore factory external calibration
values
.
Test
Not available to user.
RS232 test. Connect pins 2 & 3 of
RS232 lead together
Relay 1 operation
Relay 2 operation
(GP200)
Not available to user
Encoder „rolls‟ through menu
GR150, GP200
Operating Manual
F S
LCAL
h CAL
LCLE
HCLE
rS tl
rS tE
FCAL
S ErL
RLy1
RLy2
dAC
17091 Version 12 - October 2009 75T
www.grant.co.uk
New value
F
S
not
entered
Set Cal *
S
value
F
Returns to bath
temperature with
new calibrated
values
Returns to bath
S
temperature with
factory calibrated
values
X
Displays PASS if
S
correct
Operates relay 1
S
Operates relay 2
S
X
Page 22
New value
entered
EN