Chauvin Arnoux C.A 1725 User manual

11
n TACHOMETER C.A 1725
C.A 1727
ENGLISH User's Manual

3131
CONTENTS
1. INTRODUCTION ...................................................................... 32
2. DESCRIPTION......................................................................... 32
2.1 TACHOMETER ........................................................................................................................ 32
2.2 DISPLAYUNIT ........................................................................................................................ 35
3. USE .......................................................................................... 37
3.1 CONTACT-FREEMEASUREMENTS ........................................................................................ 37
3.2 MEASUREMENTSWITHCONTACT ........................................................................................ 37
3.3 MEASUREMENTSWITHEXTERNALINPUT ........................................................................... 38
4. OPERATION............................................................................. 40
4.1 MEASUREMENTUNITS .......................................................................................................... 40
4.2 MIN/MAXRECORDING ........................................................................................................... 41
4.3 HOLDOFTHEDIGITALVALUEONTHE DISPLAY................................................................ 42
4.4 SMOOTHINGOFTHEMEASUREMENT .................................................................................. 43
4.5 MANUALCHOICEOFRANGE ............................................................................................... 43
4.6 COUNTING(C.A1727only) ................................................................................................... 44
4.7 RECORDINGOFMEASUREMENTS(C.A1727only) ............................................................. 44
4.8 ALARMS (C.A 1727 only) ..................................................................................................... 45
4.9 PROGRAMMING(C.A1727 only) .......................................................................................... 46
4.10 PROCESSINGOFTHE DATAONAPC(C.A1727only) ........................................................ 50
5. MAINTENANCE ....................................................................... 51
6. CHARACTERISTICS ............................................................... 52
6.1 GENERALCHARACTERISTICS ............................................................................................. 52
6.2 METROLOGICALCHARACTERISTICS................................................................................... 53
6.3 CHARACTERISTICSOFTHESENSOR .................................................................................. 55
6.4 CHARACTERISTICSOFTHEADAPTERANDITSENDFITTINGS .......................................... 56
7. TO ORDER............................................................................... 57

32
1. INTRODUCTION
C.A 1725 and C.A 1727 tachometers, specially designed for industrial applications, measure the speed
of rotation of any moving part at a distance or by contact.
CHAUVIN ARNOUX tachometers provide many possibilities in addition to the usual functions:
- Direct reading of the measurement
- Measurement of period, of frequency, of duty cycle, of linear speed
- Measurement by external sensor
- Special functions: smooth, range, hold, etc.
- Dual display: 100,000-point digital and bargraph.
- The C.A 1727 can be parameterized and has a USB link; associated with its specific software, it
provides an extensive range of measurement, acquisition, processing, and data analysis possibilities.
2. DESCRIPTION
2.1 TACHOMETER
1Optical sensor
2key
-Tore last digital value displayed.
-Disable automatic stop.
key on the C.A 1727 only :
-For programming : shift the selection of the active digit or of the decimal point to the right.
3key
-Smooth the measurements.
key on the C.A 1727 only :
-For programming : increment the active digit.
4key on the C.A 1727 only :
-Activate the audible and visual alarms.
-Program the alarm thresholds.
5key on the C.A 1727 only :
-Command recording of the measurements in memory.
key on the C.A 1727 only :
-Program the rate at which the measurements are recorded in memory.
6USB output connector, on the C.A 1727 only.
7Connector for external input.
8Rotary switch.

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9key on the C.A 1727 only :
-Programming.
-Initialize the program memory.
10 key on the C.A 1727 only :
-Event counter.
key on the C.A 1727 only :
-Program the scale factor : coefficient K.
11 key
-Manual or automatic change of range.
-Extend the measurement range at low frequency.
key on the C.A 1727 only :
-For programming : decrement the digit.
12 key
-Recordminimaandmaxima.
-Disable the buzzer.
key on the C.A 1727 only :
-For programming : shift the selection of the active digit or of the decimal point to the left.

34

3535
2.2 DISPLAYUNIT
1 Programming mode, on the C.A1727 only.
2 Low threshold crossed, on the C.A 1727 only.
3 Full-scale coefficient K, on the C.A 1727 only.
4 Low threshold function, on the C.A 1727 only.
5 Memory write function, on the C.A 1727 only.
6 High threshold function, on the C.A 1727 only.
7 High threshold crossed, on the C.A 1727 only.
8 Rate of recording of measurements function, on the C.A 1727 only.
9 Transmission or reception in progress, on the C.A 1727 only.
10 Flashing indicator of operation of the infrared sensor.
11 Full-scale value of the bargraph (from 2 to 200 x 1000).
12 Analogue display by bargraph.
13 Arrowhead(s) indicating overshoot of end of scale.
14 Speed of rotation - Revolutions per minute
15 Revolutions: count of number of revolutions, on the C.A 1727 only.
16 metres per minute: linear speed.
17 Hertz: frequency.
18 Digital display, 5 digits.
19 Measurements in smoothed values.
20 Frozen display of the last measurement.
21 Recording paused.
22 Device in permanent operation.
23 Battery charge indicator.
24 MIN/MAXrecording.
25 Buzzer active indicator.
26 Reading of MAX memory.
27 Measurement range extended to 0.1 Hz.
28 ReadingofMINmemory.
29 Disable automatic change of range.
30 Counting function, on the C.A 1727 only.
31 Millisecond: period.
32 Duty cycle.
33 · ft/min: feet per minute - linear speed (in English).
· tr/min: revolutions per minute - speed of rotation.
34 Graduated fixed scale.
35 Measurement by external connector.
36 Optical transmitter in action.

36

3737
3. USE
3.1 CONTACT-FREEMEASUREMENTS
The contact-free measurement is made by the optical sensor built into the device. This sensor, placed
in the front of the device, comprises a frequency-modulated infrared transmitter.
Before making any measurement, it is necessary to prepare the revolving target of which the speed is
to be determined.
Check that the surface sighted is free of spurious reflections that might be counted in addition to the
pulses from the reflecting adhesive. Proceed as follows: before applying the adhesive used to make
the measurement, turn the target and check that when it is sighted the reading remains at ---. If not, it
will be necessary to cover the entire surface of the target with a mat black medium.
When the target is correct, apply a reflecting adhesive tape on it, along the longest available radius. On
small targets, the area covered by the adhesive tape must be less than 50% of the total area of the
rotating part.
Start the target turning, aim the front of the device at it, and check that the measurement OK symbol
flashes regularly.
The distance between the sensor and the target must be between 1 and 50cm.
The measurement angle of 30° (15° on either side of the perpendicular to the target) is convenient for
aiming purposes.
During measurements of low speeds, very small movements of the device may make the measurement
unstable: if this happens, we recommend placing the device on a stable support. There is a nut on the
underside of the device for attachment to a tripod or similar support.
3.2 MEASUREMENTSWITHCONTACT
The mechanical adapter and its 3 end fittings allow measurement by contact on a shaft end or on a
surface in linear motion.
It is placed in front of the sighting window of the optical sensor and accepts one of the following 3 end
fittings:
-An elastomer cone with a tip that can be used for shaft end measurements
(minimumdiameter:5mm).
-An elastomer cylinder that can be used for measurements on shafts with flat ends or shafts
smallerthan5mm.
-An elastomer wheel for linear speed measurements (1 revolution of the wheel = 0.1m).
The end fitting must be pressed against the moving part just hard enough to drive it without slippage.
The adapter is attached to the front of the tachometer housing, in front of the sighting window. It
automatically locks in position when pushed home.
-Fitting
To attach the adapter, align the three lugs on the inside of the adapter with the three recesses of the
sighting window of the housing and turn anticlockwise.
-Removal
To remove it, pull the adapter outward until the locking tabs are clear, then turn clockwise.

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3.3 MEASUREMENTSWITHEXTERNALINPUT
The device has a 4-contact connector that can be used to connect an external source of which you
wish to measure the speed, the frequency, the period, the duty cycle, etc.
In order to inform the tachometer that the measurement is available on the external input, it is necessary
to short-circuit contacts 1 and 4.
Operation using the external input is indicated on the display unit by the extinction of the transmission
symbol and the display of EXT.
Wiring 1- earth
Connector of the tachometer 2- measurement input (± 20VC max.)
seen from contact side 3- see below
4- to be short-circuited with contact no.1
Connecting 1 to contact 3 makes it possible to adapt the triggering threshold to the nature of the signals.
Contacts 1 and 3 not connected
For operation with 0 - 5V TTL signals.
The triggering threshold is +1.1V (at 1kHz).
To avoid the problems due to noise often present in an industrial environment, the threshold has a
hysteresis of 250mV.
Contacts 1 and 3 connected
For operation with signals balanced with respect to earth.
This function allows direct measurement using a variable-reluctance magnetic sensor or the output of
an alternator.
Thetriggeringthresholdis 300mV (at1kHz),withahysteresis of 250mV.Theresidualnoisesuperimposed
on the signal to be measured must be less than 250mV so as not to interfere with the measurement
when the threshold is crossed.
ATTENTION :
The maximum voltage to input no. 2 must not exceed ± 20Vp. The earth of the external input
connected is electrically connected to the earth of the USB digital output.
The external input must be used for the measurement of slow signals, from 0.1Hz. The table below
sums up the characteristics of this input.

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Measurement frequency range from 1Hz to 10kHz
from 0.1Hz to 10kHz in expanded range
Functions available same as optical sensor
Accuracy same as optical sensor
Inputimpedance ≥75kΩ
Balanced signals mode 300mV ± 90mV at 1kHz
Thresholds 600mV ± 160mV at 10kHz
Hysteresis 250mV ± 80mV
TTL signals mode 1.1V ± 150mV to 1kHz
Thresholds 2.2V ± 300mV to 10kHz
Hysteresis 250mV ± 80mV
Maximumvoltage ± 20V peak
Acceptable overload (1second) 250Vrms
Example of DUTY CYCLE Measurement on EXTERNAL INPUT
When the external input is used, the FRB connector provided with the device must be connected to the
source of the signal to be measured, then to the connector marked EXT.
Consider a signal like the one shown in the figure below:
Here, the frequency of the signals is given by the formula :
1
f = T
T = 5 x 1ms = 5ms
1
so f = = 200Hz
5.10-3

40
The duty cycle is given by :
t1
Duty = t1+ t2t1
or, in %. Duty % = x 100
t1+ t2
Here, we have :
3
Duty % = x 100 = 60%
3 + 2
To make this measurement with the C.A 1725 or C.A 1727 tachometer, you must:
1) Check the amplitude of the input signal to the device. This serves to determine what threshold
must be set. Here, the amplitude is greater than +1.1 V, so contacts 1 and 3 of the FRB
connector must not be interconnected.
2) Switch the tachometer on by setting the rotary switch to "%".
3) The display unit indicates directly the result mentioned above.
If there is no reading on the display unit, check that the amplitude of the signal to be measured is above
the triggering threshold.
4. OPERATION
4.1 MEASUREMENTUNITS
The table below indicates the display capacity for each function.
Function Display
tr/mnorRPM 60.000 to 99999
m/mn (K = 0.1) 6.0000 to 99999
ft/mn (K = 0.328) 19.680 to 99999
Hz 1.0000 to 9999.9
Period (ms) 0.1000 to 999.99
Duty cycle % 0.1 to 99.9
Counter 0 to 99999
In a measurement extended to 0.1Hz using the Ext input, the minimum values are divided by 10.
On/Off function:
If this function is not overridden when the device is switched on (see below), the device is switched
off automatically if one of the following has not occurred during the last 5 minutes:
- Press of a key,
- Or change of setting of the rotary switch,
- Or interrogation of the digital output.
Before switching off automatically, the tachometer emits an audible beep.

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Special functions :
The following special functions are obtained when a key is kept pressed when the device is switched
on:
KEY FUNCTION
No key pressed Switched on for 5 minutes
Switched on for an indefinite duration
appears on the display unit
Switched on without buzzer
The symbol does therefore not appear
Initialization of all values contained in the program memory.
The display unit indicates „Init“
Measurement down to 0.1Hz
SLOW lights on the display unit.
4.2 MIN / MAX RECORDING
The recording function can be used to store the minimum and maximum values of the measurements.
Pressing the key switches the device into recording mode. The RECORD and symbols
are displayed. The automatic switching off function is disabled.
MIN value
Initially, the value store is OL (OVER LOAD). When the key is pressed, the value displayed
is stored in the MIN register.
Whenever a value below the value storedd in the register is measured, it is transferred to the MIN
register and 1kHz audible beep is emitted.
MAX value
The value stored at the start is zero. Ameasured value greater than the value stored in the register
leads to an update.
Each time the content of the MAX memory is modified, a 2 kHz audible beep is emitted.
Reading of the MIN/MAX memories
The values contained in the MIN and MAX registers can be displayed by successive presses
on .
The circular display indicates in turn the MAX, the MIN and the current measurement value.
Recording continues during the reading; the bargraph indicates the instantaneous measurement.
NB: if the "SMOOTH" function is activated, the MAX and MIN are determined from the smoothed values.
Stopping the MIN/MAX recording function
The recording function is stopped either by a long press on the key or by turning the switch.
Remark : The MIN/MAX functions is not available in counting mode.

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4.3 HOLD OF THE DIGITALVALUE ON THE DISPLAY
By a brief press on the HOLD key (when not in programming mode).
Pressing HOLD freezes the digital display on the last measurement displayed; the bargraph continues
to indicate the instantaneous measurement value. The display indicates HOLD. Pressing the HOLD key
again restores the display of the instantaneous measurements, and HOLD disappears from the display
unit.
in the „MIN/MAX“ recording mode
When the key is pressed while RECORD is displayed :
-The HOLD and PAUSE symbols are displayed.
-Recording stops and the values contained in the MIN and MAX memories are the last values
before .
-The digital display unit indicates the last measurement value, or else the MIN or MAX value if the
device was reading them back.
-The bargraph continues to indicate the current measurement.
Pressing the key again causes the recording of the MIN and of the MAX to resume :
-The HOLD and PAUSE symbols remain displayed.
-The display unit indicates the measurement in progress or the content of the MIN/MAX memory
being read back.
-The device is once again in MIN/MAX mode, but the memories have not been reset and they
contain the MIN and MAX values present before the .
When the HOLD and RECORD - PAUSE symbols are displayed, it is always possible to display, in a
circular manner, the values in the memories and the instantaneous measurement value, by brief
presses on the .
The bargraph always indicates the current measurement value.
Whatever display is in progress :
-A brief press on the key restores recording without resetting the memories.
-A long press on the key stops recording.
HOLD memory MAX memory
HOLD
RECORD PAUSE MAX RECORD PAUSE
Instantaneous
measurement MIN memory
RECORD PAUSE MIN RECORD
PAUSE
MIN MAX
MIN MAX
MIN MAX
MIN MAX

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Application :
When the tachometer is used in a place where it is difficult or impossible to read the display unit, the
HOLD function can be used in conjunction with MIN/MAX recording to store the minimum and maximum
values reached.
4.4 SMOOTHINGOFTHEMEASUREMENT
Pressing the key starts the smoothing of the measurement (SMOOTH displayed). The digital
value indicated is then the sliding average of the last 10 measurements (approximately 5 seconds).
The bargraph always indicates the instantaneous measurement.
In MIN/MAX recording, if the SMOOTH symbol is displayed, the values recorded are the smoothed
values.
Activating or deactivating the SMOOTH mode during MIN/MAX recording cancels the MIN and MAX
values already stored.
Remark: The SMOOTH function has no effect on the counting function.
4.5 MANUALCHOICEOFRANGE
When the device is switched on, or during a change of function, the device automatically selects the
most appropriate measurement range. Each function has 4 or 5 ranges, except for the duty cycle
function (2 ranges).
In automatic operation, the digital display unit has a display capacity of 20,000 points and the possible
full-scale values of the bargraph are 2, 20, 200, 2000, 20,000, and 200,000.
In the automatic mode, the digital display unit switches to a higher range when
20,000 points is reached.
A first brief press (<2 s) on the key freezes the current measurement range. RANGE
appears on the display unit. The digital indicator then has a display capacity of 100,000 points.
Each new press on the key switches both displays (bargraph and digital) to the next
higher range. From the highest range (20,000) the key switches the device to the 2 range.
To exit from the manual range change mode, press the key for more than 2 seconds.
Remark:
If the measurement value exceeds the display capacity, the display unit indicates OL and the range
overshoot arrow appears to the right of the bargraph.
ATTENTION :
The functions described in the paragraphs that follow are available only on the C.A 1727.

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4.6 COUNTING (C.A1727 ONLY)
Press the COUNT key to switch the device into the event counting mode. COUNT appears on the display
unit and the measurement units are changed (see table below).
Measurements mode COUNTmode
tr/min rev (revolution)
m/min m (metre)
RPM REV (revolution)
ft/min ft (foot)
Hz /
ms /
Duty % /
The Hz, ms, and % symbols disappear. There is no longer a measurement unit displayed; the device
simply counts the number of pulses received.
Apress on the key stops the counting. Asecond press causes the counting that was
paused to resume.
When 99,999 events are reached, the display changes to OL.
To exit from the counting mode, simply press the key again. The counter is reset by 2
successive presses on the key.
Remarks:
-As standard,thedevicecountsmetres or feet,withameasurementresolutionequal to the circumference
of the end fitting used, 0.1m or 0.328ft. This resolution can be changed by changing the value of K.
- In the counting mode, the recording, change of range, and smoothing functions are not available.
4.7 RECORDINGOFMEASUREMENTS(C.A1727 ONLY)
The key can be used to record the value displayed.
-with HOLD :
The record will be the last value displayed, preceded by HOLD.
-with MIN/MAX recording :
When the device is in recording mode (RECORD, MIN or MAX on the screen), the PRINT command
records the MIN, the MAX and the current measurement.
-with record MIN MAX + HOLD :
In this mode (RECORD - PAUSE and HOLD symbols displayed), the PRINT command records the
following four parameters:
-TheHOLDvalue
-The value contained in the MIN register
-The value contained in the MAX register
-The current measurement value.

4545
-with SMOOTH
The value recorded is then the smoothed value, when this function is displayed (SMOOTH).
For the entire duration of recording of the information, the PRINT and COM symbols are displayed.
When the Scanning function is programmed (see "Recording Interval"), pressing the key
starts the measurement recording cycle according to the interval programmed. The SCAN symbol is
displayed and remains displayed for the entire duration of the scanning operation. PRINT and COM are
displayed each time data are transmitted to the memory.
A second press on the key interrupts the scanning; the last data are transmitted and the
SCAN, PRINT, and COM symbols go off.
Further presses on the key alternately start and stop the function.
4.8 ALARMS (C.A1727 ONLY)
When thresholds have been programmed, a brief press on the key activates detection of the
croosing of these thresholds by the measurement.
The or symbol is displayed, or both, according to the type of threshold programmed.
The operation of the device is summed up in the table below.
Digital measurement > low threshold
(LO AL) No action
Digital measurement < high
threshold (HI AL) No action
Digital measurement < low threshold Continuous buzzer at 1
kHz
Display of
Digital measurement > high
threshold
Continuous buzzer at 4
kHz
Display of
If the value of LO AL is greater than the value of HI AL, this
operation is reversed. The buzzer is triggered (at 2 kHz) in the
central zone between the HI AL and LO AL values.
If no threshold value has been programmed, an audible beep is emitted when the key is
pressed and the command is not accepted.
To stop the Alarm function, press the key again.

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4.9 PROGRAMMING (C.A1727 ONLY)
The device lets you program four values to define:
- Alow alarm threshold (LO AL).
- Ahigh alarm threshold (HI AL).
- Amultiplier coefficient (K).
- Arecording interval (SCAN).
A press on the key switches the C.A 1727 into programming mode; PRGM is displayed.
In the programming mode, the C.A 1727 no longer makes measurements; the bargraph is off, the optical
transmitter is off.
The functions of the keys become those indicated in yellow above each key.
Functions of the keys in Functions of the keys in
measurement mode pogramming mode
Shift left
Shift right
Increment active digit
Decrement active digit
Program scanning
Program threshold
Program coefficient K
Procedure
The explanations below describe the procedure to follow to program the various memories of the
C.A 1727. These stages are common to all functions: scanning, thresholds, and coefficient K.
The "Alarm thresholds" to "Recording interval" paragraphs describe the features specific to each function.
Before switching the C.A 1727 to programming mode, you must choose, on the rotary switch, the
function of which you wish to program the values.
Pressing the key displays the PRGM symbol, switches off the bargraph, and displays "-----".
The second stage is choosing the function to be programmed, by pressing
the: ;or key.
The digital display unit then indicates the value contained in the memory, or "-----" if nothing has yet been
programmed (when programming for the first time, or if the last programming disabled this function). At
the same time, the left-hand digit (or dash) flashes.
Programming is on 100,000 points (0 to 99,999), and there are 5 possible positions of the decimal point
for the alarm thresholds (the decimal point is fixed for K and the SCAN interval has no decimal point).
A value is entered in memory as follows:
A/ writing of all digits of the desired value, without taking account of the decimal point.
B/ positioning of the decimal point.

4747
A/ Writing of a number without a decimal point:
When the dashes are displayed, pressing a horizontal shift key replaces the dashes by zeros, by the
value previously recorded, or by the extreme value possible compatible with the function. The value of
the active digit (flashing) is incremented or decremented by pressing the or .
key, respectively. Increasing a digit from 9 to 0 automatically increments the digit (or digits) to the left of
it, while decreasing a digit from 0 to 9 automatically decrements the digit (or digits) to the left of it.
If during the incrementation or decrementation operations the maximum display capacity is exceeded,
the display unit reverts to displaying five dashes.
The and keysareusedto shift the activedigit(flashing),theone to be programmed,
to the left or to the right, respectively.
When the left-hand digit is active, pressing the key causes the appearance of the five
dashes or of the value previously recorded in memory.
Validation is effected by pressing the key or another programming key (e.g. SCAN).
Validating "-----" stops and cancels all programming.
B/ Positioning of the decimal point:
To activate the decimal point, you must press the key until the right-hand digit flashes.
Pressing the key again activates the shifting of the decimal point. The and/
or key can then be pressed to set the dcimal point to desired position.
When the decimal point is located on the left or right side of the display unit, pressing
the or key, respectively, causes the appearance of „-----“.
Example: 1. Display
2. Key
3. Display
Example: 1. Display
2. Key
3. Display
4. Key
5. Display

48
To return the decimal point to the display unit, simply press the or key, depending
on whether the decimal point exited on the left or right, respectively. Because there are five possible
positions of the decimal point, the resolution of the programming may be finer than the resolution of the
measurement. When this is the case, the crossing of the alarm thresholds is still determined according
to the true measurement resolution.
To exit from the programming mode, and to validate:
Either press the . You leave the programming mode and PRGM goes off.
-Or switch to another programming function by pressing , or key.
-Or turn the switch to any other position except "OFF". The device then returns to measurement
mode (switching to "OFF" disables validation and entails the loss of the current values; the
values previously recorded remain valid).
The information contained in memory is read back in the same way as it is programmed, except that
the , , and keys must not be used.
Alarm thresholds (C.A 1727 only)
Two thresholds can be set. To program these values, press the key when in programming
mode.
A first press on the key results in the display of and lets you program the low threshold.
Asecond press on the key validates the low threshold (LO AL), displays and lets you
prigram the high threshold (HI AL).
When a threshold is programmed and the ALARM function is activated, the corresponding symbol
appears on the display in measurement mode and the measured value is compared to this value at all
times. An overshoot of the threshold results in the display of the corresponding symbol and activates
the buzzer (see the use of this function in the "ALARM" section).
When one or both alarm thresholds have been programmed and activated, it or they appear on the
bargraph in reverse video (with respect to the measurement): black if the deviation is below the
threshold, white if the deviation is above the alarm threshold, flashing (4 Hz) if the measurement is
equal to the threshold value.
Coefficient K (C.A 1727 only)
Coefficient K is a multiplier applied to the raw measurement value in order to obtain a display that can
be used as is.
Examples:
-Programming of a gearbox ratio. This makes it possible to display, directly, the output speed of
a reduction gear while measuring the input speed.
-Flow measurements. Aflow meter delivers one pulse every 2 m3. Setting a coefficient of K =
2 makes the reading in Hz equal to the flow rate in m3 per second. The COUNT function delivers,
in addition, the total volume that has flowed through the pipe.
Pressing the key in the PRGM mode lets you program the value of coefficient K.
When a coefficient other than the initial value has been programmed, the symbol K appears on the
display unit in the measurement mode. The digital display and the bargraph then both apply multiplier
coefficient K.

4949
The K symbol can be made to disappear only by reprogramming the original value of coefficient K (see
the table below).
The programming of K is limited to values between 99.999 and 0.010. No other values are accepted.
Measurement Counting Original K
K in tr/mn K in revolutions 1
Kinm/min K in m 0.1
KinRPM K in REV 1
K in ft/min K in ft 0.328
K in kHz, ms, % K in pulse count 1
Programming a coefficient K does not change the maximum measurement and display limits (0.1 to
10,000Hz and 0 to 99,999 points).
The table below indicates the frequency limits as a function of the programmed value of coefficient
K (it is assumed that the external input connector is used). Beyond these limits, the display indicates
"OL" for an overshoot and "-----" for an undershoot.
Measurement unit Programmed coefficient K
0.01 99.999
MAX input freq., 9999.9Hz 1000Hz
giving a MAX
display of 99999pts 99999pts
Hz MIN input freq., 0.1Hz 0.1Hz
givingaMIN
display of 0.0010pts 9999pts
MAX input freq., 10.000Hz 16.666Hz
tr/minorRPM giving a MAX
display of 6000.0pts 99999pts
MIN input freq., 0.1Hz 0.1Hz
m/min givingaMIN
display of 0.0600pts 59999pts
Measurement unit Programmed coefficient K
0.033 32.81
MAX input freq., 10000Hz 50.8Hz
ft/min giving a MAX
display of 19800pts 99999pts
MIN input freq., 0.1Hz 0.1Hz
1ft = 0.3048cm givingaMIN
1m = 3.281ft display of 0.1980pts 196.86pts