Fieldpiece ACH User manual

300AC Current Clamp
Accessory Head:
Model ACH
Fieldpiece
OPERATOR'S MANUA

Quick start...Quick start...
Quick start...Quick start...
Quick start...
Clamp the jaws around a single
conductor, set the meter to the
lowest mVAC range and read
amps up to "199.9".
Introduction...Introduction...
Introduction...Introduction...
Introduction...
The Fieldpiece Model ACH
converts AC current to a voltage
easily measured by most DMM's
by just clamping the jaws around a
current carrying conductor.
The model ACH1 current
clamp converts AC amps to
voltage at a rate of 1 amp to 1mV
(1000 to 1).
The ACH Clamp Head was
designed to be snapped directly
onto the Fieldpiece HS Series
DMM or to be used with the
Fieldpiece HB70 series or any

DMM that has the industry
standard "Fluke" style input jacks
using the Deluxe Test Leads
(ADL2).
When snapped onto the
Fieldpiece HS Series Stick Style
DMM the pair make a convenient
one piece digital clamp meter that
reads current directly, without
requiring the user to perform
mental calculations or move the
decimal point.
The ACH also snaps onto the
EHDL1 electronic handle to make
a convenient stand alone current
clamp meter.

For your safety...For your safety...
For your safety...For your safety...
For your safety...
Do not attempt to measure any
circuit in which the circuit-to-
ground voltage exceeds 1000V
rms.
Measurement of AC power
sources with inductive loads or AC
power sources during electrical
storms may result in extremely
high-voltage, high-energy transients
that could damage the meter and
consequently expose the user to a
dangerous shock hazard.
Inspect the test leads for
damage to the insulation or exposed
metal. Replace or do not use if
suspect.
When disconnecting from a
voltage measurement, disconnect
the “hot” lead first, then the
common.

Discharge capacitors prior to
making resistance or capacitance
measurements.
Work with others.
Use one hand.Hands, shoes, and
floor must be dry when taking
measurements.
Avoid use of the current
converter under humid or damp
conditions which could affect the
dielectric withstanding voltage of
the clamp.

Specifications:Specifications:
Specifications:Specifications:
Specifications:
Current range: 1A to 300A rms
Conversion rate: 1AAC to
1mVAC.
Frequency: 40Hz to 500Hz
Operating temp.: -15 oF to 130 oF
Accuracy (±reading±least
significantdigits,72oC±8oF,
Clamp head only--add to DMM
accuracy for total accuracy)
50Hz to 60Hz ±1.5% + 1
30Hz to 500Hz ±4% + 1
Temperature coefficient: less than
0.010% per oC
Circuit-to-ground voltage:
1000Vrms max.
Maximum conductor size: 0.91
inches (23mm)
Dimensions: 1.14 inches x 2.84
inches x 4.17 inches

Operating instructions:Operating instructions:
Operating instructions:Operating instructions:
Operating instructions:
1. Connect the ACH Clamp Head
to digital multimeter V- W and
COM terminals. (Polarity is
not important.)
2. Set the multimeter to mVAC
range.
3. Snap the jaws of the current
converter around one of the
current-carrying conductors.
Make sure the jaws are tightly
clamped.
4. Directly read the current value
(in amperes) indicated on the
display (multiply by 1000 if
using the 2V range).
5. If meter dispalays overload,
change range to next highest
(2000mVAC or 2VAC. For
2VAC range, multiply reading
by 1000.)

Maintenance:Maintenance:
Maintenance:Maintenance:
Maintenance:
For the Clamp Head to operate
properly, the magnetic joint
surfaces should be maintained free
of dust, dirt, or residues of wire
insulation.
Clean the Clamp Head using a
mild detergent in water. Other
solvents may damage the plastic or
reduce the effectiveness of the
insulation. Dry the instrument
thoroughly before use.
Service:Service:
Service:Service:
Service:
There are no user serviceable
parts inside.
The warranty statement for
Fieldpiece ACH Clamp Head in
the back of this manual. Read it
carefully before requesting
warranty service. Any ACH
Clamp Head claimed to be

defective should be returned to
Fieldpiece Instruments for
warranty service.
Warranty service will typically
be made within 24 hours after
receipt of defective unit. Any non-
working out-of-warranty product
may be sent to Fieldpiece
Instrument for service. Send the
ACH Clamp Head along with a
check or money order for $15.00
to
Fieldpiece Instruments
580 West Central Ave. Suite A
Brea, CA 92821
Your repaired or replaced
Clamp Head will be returned to
you with a 6 month warranty.

WARRANTY:WARRANTY:
WARRANTY:WARRANTY:
WARRANTY:
The ACH is warranted to the
original purchaser against defects in
material or workmanship for a
period of two (2) years from the
date of purchase. During the
warranty period, Fieldpiece
Instrument will, at its option,
replace or repair the defective unit.
This warranty does not apply to
defects resulting from abuse,
neglect, accident, unauthorized
repair, alteration, or unreasonable
use of the instrument. Any implied
warranty arising out of the sale of
Fieldpiece's products including but
not limited to implied warranties of
merchantibility, and fitness for
purpose, are limited to the above.
Fieldpiece shall not be liable for
incidental or consiquential damages.