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Issue: 3

October 2010

BA558C

4/20mA loop powered

panel mounting

rate totaliser

issue 3

Label

Rate

display

Annunciators for

optional alarms

Rotating flow
indicator

Total

display

Содержание BA558C

Страница 1: ...Issue 3 1st October 2010 BA558C 4 20mA loop powered panel mounting rate totaliser issue 3 Label Rate display Annunciators for optional alarms Rotating flow indicator Total display...

Страница 2: ...factor 5 14 Percentage clip off 5 15 Local reset of total display 5 16 Security code 5 17 Over and under range 6 Calibration Examples 6 1 Using an external current source 6 2 Using the internal refer...

Страница 3: ...applied to the instrument initialisation is performed After a short delay the following display sequence occurs All segments of the display are activated for about 3 seconds Decimal points on large d...

Страница 4: ...ators plus a flow indicator as shown on page 1 Rate Shows the flow rate on the smaller display five digit display Total Shows total flow since the display instrument was last reset on the larger eight...

Страница 5: ...instrument provides IP65 protection and a gasket seals the joint between the instrument enclosure and the panel The instrument may be installed in any panel providing the environmental limits shown i...

Страница 6: ...IP65 seal between the instrument enclosure and the panel c Connect the panel wiring to the rear terminal block s as shown in Fig 5 To simplify installation the terminals are removable so that panel w...

Страница 7: ...isplay may be calibrated to show the flow rate in engineering units Both the zero display at 4mA and the span display at 20mA are adjustable although for flow application the display at 4mA is usually...

Страница 8: ...econds while the new information is stored in permanent memory All new BA558C rate totalisers are supplied calibrated as requested at the time of ordering If calibration information is not supplied th...

Страница 9: ...liamps or the input as a percentage when the P push button is operated in the display mode Select PC for of span and 4 20 to display current See section 5 12 Display Description of function SCALE t To...

Страница 10: ...cimal point clip off to adjust value Press or between 0 and 10 or and pressing Define Security Enter by Code to move to next digit Local reset or Fig 7B Programme Structure CLr Gtot E E E E E E E E P...

Страница 11: ...or and Similarly set the required full scale display accurate 20mA input current scale display using an Similarly set the required full to move to next digit pressing or and set required zero display...

Страница 12: ...s have been correctly positioned press E to return to the main menu If the application requires flow rate to be the primary display i e shown on the large display the d P function enables the rate and...

Страница 13: ...ive access to the sub menu 5 9 1 AC rejection FrE WARNING If the mains filter frequency is changed the rate display and the internal references if used must be recalibrated To provide maximum low freq...

Страница 14: ...ress E to return to the main menu 5 12 Function of the P push button C P This parameter defines the function of the P push button when the BA558C is in the display mode Either the input current in mil...

Страница 15: ...lect CLIP OFF from the main menu and press P to reveal the current setting This clip off threshold is shown as a percentage of total flow and may be adjusted in one percent increments using the Up or...

Страница 16: ...ection 7 1 describes the preferred method of calibration using an external traceable 4 20mA calibrator Section 7 2 contains an example of calibration using the BA558C internal 4 and 20mA references wh...

Страница 17: ...ress the Up or Down push button until the second least significant digit and following decimal point of the total display flash This gives the required total display resolution of 0 1 Press P to move...

Страница 18: ...to the main menu by pressing E Step 12 Reset the grand total to zero To reset the grand total to zero select CLr Gtot from the main menu and press P which will cause the instrument to display Clr no...

Страница 19: ...nd by displaying root which is the first function in the main menu Steps Perform as described in the 3 to 7 previous calibration example see section 6 1 Step 8 Calibrate the rate display Scroll throug...

Страница 20: ...e display 4 20mA current is noisy or the flow signal is unstable Eliminate source of electrical noise Reduce resolution of the rate display to mask flow noise Incorrect calibration Digital filter FrE...

Страница 21: ...ilable for a rate alarm and shows which are fail safe i e output is in the alarm condition open when the 4 20mA input current is zero Similarly when programmed as a total alarm the output should be op...

Страница 22: ...es the alarm function without changing the alarm parameters See section 8 3 3 tYPE Type of alarm Defines whether the alarm operates on the rate or total display See section 8 3 4 SPr1 Alarm setpoint 1...

Страница 23: ...YPE This function conditions the alarm to operate on the rate or total display Alarm 1 and Alarm 2 may both be conditioned as rate or total alarms or one may be conditioned for rate and the other for...

Страница 24: ...ing figure Each digit can be adjusted using the Up and Down push buttons and the P button to move to the next digit When the required hysteresis has been entered press E to return to the alarm menu e...

Страница 25: ...etpoints by pressing the P and Up buttons simultaneously New instruments with alarms are supplied with this function disabled and the security code set to 0000 8 3 12 Adjusting alarm setpoints from th...

Страница 26: ...current limiting resistor in series with the supply will reduce the display brilliance 8 5 Additional front panel protection Although the BA558C has an IP65 sealed front panel for installations in hos...

Страница 27: ...otal 5 6 d P 5 3 5 6 EnbL 8 3 2 8 3 3 Fault finding during commissioning 7 1 after commissioning 7 2 Flow indicator 2 2 Flow transmitter loops 3 1 Grand total 2 1 clear 5 3 5 10 Guarantee 7 5 HI LO 8...

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