Page 5
General InformationSECTION 1The Hastings Model 40 Power Supply is a combination power supply and digital readout monitor,
for up to four Hastings Flow Instruments having the model number prefixes of HFM, ST, or FST
and up to 2 of the HFM-D series. The gas conv ersion factor can be set individually for each channel
by front panel mounted potentiometers. This allows meters calibrated for air to be used for other
gases without recalibration. These controls provide for easy monitoring of the flow instruments with
minimal time required to get the flow instruments on line.
1.1 Features:
Front panel dial-in gas conversion factors for each channel.
The power supply fuse is user-accessible from the rear of the instrument without disassembly of the
case.
A rear panel terminal strip provides the user with analog output from flow instruments.
A 3-1/2 digit LCD display monitors the flow instruments.
Input voltage is internally switchable between 115 and 230 VAC.
Display can be set up to read directly in the units in which the flow instrument is calibrated.
1.2 Specifications:
• Weight: Approximately 4 lbs.
• Dimensions: 3.47"(H) X 9.47"(W) X 7.19"(D) — see page 20.
• Meter: 3-1/2 digit LCD
• Power: 90-125/180-250 VAC 50 or 60 HZ
• Output: 15 VDC @ ±300 mA
• Use: 1 to 4 channels
• Scaling: Individual channel meter adjustment.
• Signal Output: 0-5 VDC into 2K Ohms minimum load. All four channels can be read simulta-
neously.
• Feet and a stand are standard. They are easily remo veable for rack mounting. (mtg screws can
cause electrical shorts if reinstalled without feet and stand)
OPTIONAL CABLES:
• Type AF-(length)-AM for “D” connector
• Type CE-(length)-AM for edge connector
8, 25, 50, 100 ft. lengths available as separate item.
Cables DO NOT have to be the same length.