Figure 7. Rear panel of HM-3000 showing Analogue Port, RS-232 Port,
RS-485 Input and Output and the four instrumentation channel
inputs.
Multi Device Connection
Multi devices, such as HM-3000s, HM-2325A, HM-2330D MiniLoggers, HM-
2560A, HM-2700A, HM-2700D Direct shear Apparatus can be connected to
a computer via the HM-3000’s RS-485 port. This allows you to daisy-chain
several devices to the same computer; require HM-000375 (RS232 to RS485
converter not included). Use a standard CAT 5 cable (not included) to link
the additional device’s output port to the HM-3000’s RS-485 input port
(refer to Figures 7 & 8). Dip switches need to be set to primary or
secondary usage (see Figure 9).
The minimum compatible computer configuration is a PC with Pentium 4,
1.2GHz processor, 512 MB of RAM, and a 80GB hard drive Windows 2000 or
XP with SP2 or later.
Analogue Device Connection
The HM-3000 can be set up to output directly to a chart recorder to provide
a hard copy printout of test results. To accomplish this, connect your chart
recorder via cable attached to the HM-3000’s Analogue port on the back
panel (see Figure 7).
8
6
9
5
1
sweep
reset
not
connected
CH3
CH4
CH1
CH2
D-SUB, 9-PIN MALE
ANALOG PORT ACCESS
Cable configuration for
analogue port access.
Pins 1, 2, 3 & 4
(Reserved for
Humboldt Chart
Recorder)
