Umbilical Cords - SCP SCIENCE DigiPREP Service Manual

To verify the over temperature protection switch
is closed, measure between pin 7 and pin 9: this
should return a resistance based on the resistance
of the heater mat (see table on page 88).
UMBILICAL CORDS, S104
The S104 umbilical harness is the power, and
communication medium between the block and
the controller. There are two formats of umbilical
cords: the new version includes Jr blocks with
s/n JR640404137 forward, HP Blocks with
s/n 9241030022 forward, MS blocks with s/n
MS45030019 forward, and any LS block. Any
previous serial numbers have the old format umbilical
harness.
New-style umbilical harness tests
1. Place the multi-meter on the continuity setting.
2. Measure between pin 2 and the graphite block.
This should return continuity. Ensure you pick a
spot that is not covered with Tefl on.
3. Measure between pin 2 (ground) and each pin
individually. No pins should return continuity.
4. Measure between pin 4 (EX+) and pin 6 (M+).
This should return continuity.
5. Measure between pin 1 (EX-) and pin 3 (M-).
This should return continuity.
6. Measure between pin 7 (L) and pin 9 (N). This
should return a resistance based on the following
table:
MODEL
DigiPREP Jr
DigiPREP MS
DigiPREP HP
DigiPREP LS
DigiPREP HT
7. Measure between pin 6 on the umbilical cord
(M+/EX+) and pin 1 of the dongle port. This
should return continuity.
8. Measure between pin 3 on the umbilical cord
(M-/EX-) and pin 3 of the dongle port.
This should return continuity.
Old-style umbilical harness tests
Instruments with the old-style umbilical harness
are for Junior blocks with s/n JR640404136 and
earlier, HP blocks with s/n 9241030021 and earlier,
and MS blocks with s/n MS45030019 and earlier.
Please note this style is discontinued and can no
longer be purchased. All LS blocks have the new
form of umbilical cord.
SCP SCIENCE
VOLTAGE SELECTOR
RESISTANCE
SWITCH POSITION
115V 18 ± 2
230V 71 ± 2
115V 15 ± 2
230V 57 ± 2
115V 15 ± 2
230V 57 ± 2
20 ± 2
230V
230V 16 ± 2
Version 1.0
KeyPad
77